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GPT-5.3 Chat
openai/gpt-5.3-chat
OpenAI / GPT
GPT-5.3 Chat is an update to ChatGPT's most-used model that makes everyday conversations smoother, more useful, and more directly helpful. It delivers more accurate answers with better contextualization and significantly...
Released
2026-03-03
Context window
128K
Max output
16K
Weights
Closed
Modalities
TextInputImageInputTextOutputDocumentInput
Capabilities
AttachmentsTool callStructuredTemperature
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